Home / 3,122.32-4,306.89-2,128.05

Finding the Fourth Proportional to 3,122.32, 4,306.89 and 2,128.05

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Solution

The fourth proportional to 3,122.32, 4,306.89 and 2,128.05 is: 2,935.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,122.32 : 4,306.89 = 2,128.05 : x
  2. Step 2: Convert to fraction form
    3,122.32/4,306.89 = 2,128.05/x
  3. Step 3: Cross multiply
    3,122.32x = 4,306.89 × 2,128.05
  4. Step 4: Simplify right side
    3,122.32x = 9,165,277.26
  5. Step 5: Solve for x
    x = 9,165,277.26/3,122.32
  6. Step 6: Final answer
    x = 2,935.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.